Make file lists collapsable (#536)

public/css/style.css

@@ -426,6 +426,17 @@ select#bottom_language_selector {
   hyphens: auto;
 }
 
+.filelist-control {
+	cursor: pointer;
+}
+
+.filelist-control::before {
+	content: "\25B6   ";
+}
+
+.filelist-control[aria-expanded="true"]::before {
+    content: "\25BC   ";
+}
 
 /*Comments*/
 

templates/view.html

@@ -90,10 +90,10 @@
             </div>
         </div>
         {{ if gt (len .FileList) 0 }}
-        <div class="row" id="files">
+        <div class="row">
             <div class="col-md-12">
-                <h4>{{T "files"}}</h4>
-                <div class="table-responsive">
+                <h4 data-toggle="collapse" data-target="#files" class="filelist-control" aria-expanded="false">{{T "files"}}</h4>
+                <div class="table-responsive collapse" id="files">
                     <table class="table custom-table-hover">
                     <tr>
                         <th class="col-xs-8">{{T "filename"}}</th>